a, Survival of A. pompejana specimens after the recovery from the PERISCOP sampling device (‘sampling’, n = 9) and the subsequent in vivo experiments in the BALIST aquarium (‘20°C’, n = 19; ‘42°C’, n = 24; ‘55°C’, n = 18). b, Coelomocytes death in animals from Fig. 3a. c, Hsp70 gene expression (mean for n = 5 individuals ± s.e.m.). Among the four A. pompejana’s hsp70 genes (Alvinella database [12]), two forms showed significant changes according to temperature, and the form that showed the most significant changes is presented here. d, Normalized fold hsp70 expression in gills, posterior part and coelomocytes of experimented animals with respect to ‘sampling’ specimens.